Pulling to the Left under hard braking.

joebrez · May 19, 2017

Need some help.

94 Vert GT MTX.

Pulls to left when hard braking at higher speeds. Gradual Braking is completely normal even at higher speeds, think panic stop. I'll also add that it does the initial pull almost immediately on hard braking, then seems to levels out where you no longer need to correct the steering anymore. It's such a weird issue.

So I've replaced:
New shocks/Struts (all 4) , tires (4) , rotors/calipers/pads (all 4), Brake fluid flushed, had it aligned (did get better after alignment) and ball joints/tie Rods all seem tight.

Doesn't wonder without braking (tracks straight as an arrow). I'm leaning to steering rack bushings, but would think it would do it all the time.

I posted this on a FB group also and 2 suggestions have been ABS Sensor (not sure how that would be since ABS isn't engaging and no lights) and replace Brake hoses (which under inspection seem fine.)

Thoughts?

07GtS197 · May 19, 2017

Usually brake hoses will give you problems after you have released the brake where it acts as a one way valve and keeps fluid in the line causing the caliper not to release right away. Id suspect abs as well. When the brakes were flushed, was an abs tool used? You can have air in the abs pump.

joebrez · May 19, 2017

07GtS197 said:
Usually brake hoses will give you problems after you have released the brake where it acts as a one way valve and keeps fluid in the line causing the caliper not to release right away. Id suspect abs as well. When the brakes were flushed, was an abs tool used? You can have air in the abs pump.

It was flushed with a Motive Power Bleeder w\ the Ford cap attachment, so no special ABS tool. The fluid was nasty (guessing original as most of the car was) and had the same symptom before and after the fluid change.

07GtS197 · May 20, 2017

joebrez said:
It was flushed with a Motive Power Bleeder w\ the Ford cap attachment, so no special ABS tool. The fluid was nasty (guessing original as most of the car was) and had the same symptom before and after the fluid change.

Air could have gotten into the abs pump at one time and was not flushed out when you flushed the lines. The abs pump needs to be activated for a full flush. For shits and giggles you could do a few panic stops to get the abs pump to kick on and get the fluid thats in it moving around and bleed again. Thats just a shot in the dark though. It is a strange issue indeed.